Making Deductions 1, Q no. 3

Why the numbers can’t be 0. Since all 50 has to be a same number, If all the 50 numbers are 0 the SD would be 0 as well, right, that makes options B correct. What am I missing?

Edit: Sorry i guess I missed the part in the question that: “what can be deduced”? My bad.

Sorry i guess I missed the part in the question that: “what can be deduced”? My bad.